hw/net/rocker/rocker_of_dpa.c: Remove superfluous error check

of_dpa_cmd_add_acl_ip() is called from a single place, and despite the
fact that it always returns ROCKER_OK, its return value is still checked
by the caller.

Change of_dpa_cmd_add_acl_ip() to return void and remove the superfluous
check from of_dpa_cmd_add_acl().

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2471
Signed-off-by: Rodrigo Dias Correa <r@drigo.nl>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Message-id: 20241114075051.404284-1-r@drigo.nl
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/net/rocker/rocker_of_dpa.c

@@ -1635,8 +1635,8 @@ static int of_dpa_cmd_add_multicast_routing(OfDpaFlow *flow,
     return ROCKER_OK;
 }
 
-static int of_dpa_cmd_add_acl_ip(OfDpaFlowKey *key, OfDpaFlowKey *mask,
-                                 RockerTlv **flow_tlvs)
+static void of_dpa_cmd_add_acl_ip(OfDpaFlowKey *key, OfDpaFlowKey *mask,
+                                  RockerTlv **flow_tlvs)
 {
     key->width = FLOW_KEY_WIDTH(ip.tos);
 
@@ -1669,8 +1669,6 @@ static int of_dpa_cmd_add_acl_ip(OfDpaFlowKey *key, OfDpaFlowKey *mask,
         mask->ip.tos |=
             rocker_tlv_get_u8(flow_tlvs[ROCKER_TLV_OF_DPA_IP_ECN_MASK]) << 6;
     }
-
-    return ROCKER_OK;
 }
 
 static int of_dpa_cmd_add_acl(OfDpaFlow *flow, RockerTlv **flow_tlvs)
@@ -1689,7 +1687,6 @@ static int of_dpa_cmd_add_acl(OfDpaFlow *flow, RockerTlv **flow_tlvs)
         ACL_MODE_ANY_VLAN,
         ACL_MODE_ANY_TENANT,
     } mode = ACL_MODE_UNKNOWN;
-    int err = ROCKER_OK;
 
     if (!flow_tlvs[ROCKER_TLV_OF_DPA_IN_PPORT] ||
         !flow_tlvs[ROCKER_TLV_OF_DPA_ETHERTYPE]) {
@@ -1776,14 +1773,10 @@ static int of_dpa_cmd_add_acl(OfDpaFlow *flow, RockerTlv **flow_tlvs)
     switch (ntohs(key->eth.type)) {
     case 0x0800:
     case 0x86dd:
-        err = of_dpa_cmd_add_acl_ip(key, mask, flow_tlvs);
+        of_dpa_cmd_add_acl_ip(key, mask, flow_tlvs);
         break;
     }
 
-    if (err) {
-        return err;
-    }
-
     if (flow_tlvs[ROCKER_TLV_OF_DPA_GROUP_ID]) {
         action->write.group_id =
             rocker_tlv_get_le32(flow_tlvs[ROCKER_TLV_OF_DPA_GROUP_ID]);